CATALOG OF ORIGINAL DESCRIPTIONS: Ciperoella Olsson & Hemleben, in Olsson et al. 2018
This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.
Type of wall: Normal perforate, spinose, Neogloboquadrina-type wall texture with underlying ruber/sacculifer or sacculifer wall with elongate parallel ridges. Pore concentrations range from around 25-60 pores/50 μm2 test surface area and pore diameters from around 0.9-2.5 μm
Test morphology: Test low trochospiral, lobulate in outline, chambers globular to ovoid. In the final whorl, 4½-5 chambers; aperture umbilical bordered by a thin rim.
Etymology: Named after the type species. Extra details from original publication
DISTINGUISHING FEATURES.— Ciperoella n. gen. has an underlying ruber/sacculifer wall with elongate parallel ridges and short incomplete cross ridges, a wall texture like that in the nonspinose Neogloboquadrina. Porosity ranges from about 25-60 pores per 50 μm2 area. Several species are typically small in size (Globoturborotalita, to which a number of species discussed here have been previously assigned, by the distinctive reticulate nature of the wall and on average ½ to 1 more chamber in the final whorl.
DISCUSSION.— Ciperoella is a common form in the Oligocene that has been regarded by workers as a species of Globigerina. However, it does not have the wall texture of Globigerina. Hence, the naming of a new genus.
STRATIGRAPHIC RANGE.— Upper Eocene to lower Miocene.
References:
Bolli, H. M. (1954). Note on Globigerina concinna Reuss 1850. Contributions from the Cushman Foundation for Foraminiferal Research. 5(1): 1-3. gs
Olsson, R. K., Hemleben, C., Coxall, H. K. & Wade, B. S. (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Ciperoella. In, Wade, B. S., Olsson, R. K., Pearson, P. N., Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 46(Chap 7): 215-230. gs
Ciperoella compiled by the pforams@mikrotax project teamviewed: 19-9-2024
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